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Can you please explain step-by step on how to solve this problem? x - y + z = 3 -x + 4y + z =

Can you please explain step-by step on how to solve this problem?

x - y + z = 3

-x + 4y + z = -4

3x + y - 2z = 2

If we add4times the first equation to the second equation, the second equation becomes:

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